https://omsystem.com.hk/product/dslr/lens/ex25/index.html
When the EX-25 is used in combination with the ED-50mm f/2.0 MACRO lens, pictures can be taken at close to 1:1 magnification (0.98x). (Equivalent to 2:1 magnification with 35mm film cameras.)
*當使用 ZUIKO DIGITAL ED 50mm f2.0 Macro 鏡頭時,使用手動對焦,放大倍率約 0.8 to 0.98X( 當鏡頭的距離刻度於 0.3m 或 少於 0.3m 時).